One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,8,4,6)(9,10,12,14)(11,15,16,13)(17,18,21,26,22,27,20,25)(19,28,29,32,30,24,31,23)(1,2)(3,6)(4,8)(5,7)(9,11)(10,13)(12,16)(14,15) involution — undirected(11,16)(13,15)(17,19)(18,23)(20,29)(21,31)(22,30)(24,26)(25,28)(27,32) involution — undirected(1,3,5,4)(2,6,7,8)(10,14)(13,15)(17,19)(18,24)(20,31)(21,29)(22,30)(23,26)(25,32)(27,28)(1,4,5,3)(2,6,7,8)(17,20,22,21)(18,25,27,26)(19,29,30,31)(23,28,32,24)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.